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Double d = new Double(3);NumberFormat nf = NumberFormat.getInstance();System.out.println(nf.format(d));

@Documented@Retention(RetentionPolicy.RUNTIME)@Target(ElementType.METHOD)public @interface LogPub { /** * 日志打印时方法名 */ String value(); /** * 是否打印接口用时日志,默认打印 */ b...

public final class ConvertUtils {public static ObjectMapper objectMapper = new ObjectMapper();public ConvertUtils() {}public static ObjectMapper initObjectMapper() { ObjectMapper objectMapper...

currentScore = 0.6;double floor = Math.floor(currentScore);if (floor + 0.5 < currentScore) {currentScore = floor + 1;} else {currentScore = floor + 0.5;}当currentScore = 0.6输出结果为1当currentSco...

方法一:进入plsql找到table那个大项，点出来，下边会罗列出许多表右键点中你所需要的那个表名找到DBMS_Metadata然后选项里有ddl弹出来那个窗口就是你结构，拷贝出来直接在另一个库里执行方法二:PLSQL里tools下export user objects of按shift批量选择表执行就行了...

1.先将cmd下的目录切换到改文件所在目录2.连接数据库 imp xxx3.输入口令(账号,密码)4.选择是否只导入数据5.导入该文件 xxx.dmp6.输入缓冲区大小(最小为8192) 默认为307207.选择是否只列出导入文件的内容8.选择是否忽略创建错误9.选择是否导入权限10.选择是否导入表数据11.是否整个导出文件...

错误信息:2019-10-10 10:55:40.925 CONFIG 934 [AWT-EventQueue-0 - D.ﾨﾡ] Product: DbVisualizer 9.5.8 [Build #2751]2019-10-10 10:55:40.928 CONFIG 934 [AWT-EventQueue-0 - D.ﾨﾡ] OS: Windows 72019-10-10 10:55...

1.dao 层接口@Repositorypublic interface ExamInterruptDao extends BaseMapper<ExamInterrupt> { //添加 void insertTestName(@Param("list") List <ExamInterrupt> examInterruptList); //删除...